Pliers



S. E. AARON.

PLIERS.

APPLICATION FILED FEB-13.1w]- RENEWED JUNEQI. 1919- I 1,329,155, Patented Jan. 27, 1920.

UNITED STATES PATENT OFFICE.

SOLOMON E. AARON, OF BOSTON, MASSACHUSETTS.

PLIERS.

Application filed February 13, 1917, Serial No. 148,428.

To all whom it may concern:

Be it known that I, SOLOMON E. AARON, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Pliers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in hand tools, and more particularly to an improved device for facilitating the removal of insulation from electric conductors of various types.

It is an object of the present invention to provide for the ready conversion of an ordinary standard form of pliers or pincers into a tool which will render the pliers adaptable for the use of cutting insulation upon and removing the insulation from electric conductors.

A further object of the present invention is to provide an insulation removing or wire. stripping tool having means so disposed as to remove rapidly and thoroughly insulation from electric conductors, said means especially being designed so that the cutting or stripping edges thereof are dlsposed at such an angle to the meeting plane of the plier jaws as to more readily and eflectually and rapidly remove the insulation. 7 With these and other objects in view the present invention consists in providing a wire stripping tool in the form of pliers having means provided with insulation cutting and wire stripping edges, the faces of said means being disposed angularly with relation to each other and with relation to the meeting faces of the jaws, and further consists in the provision of blades adapted to be readily connected to standard forms of pincers or pliers without material alteration or work upon the pliers other than the provision of means for simply and readily attaching the blades to the pincers or pliers.

Embodiments of my invention are described in the following specification and illustrated in the accompanying drawing in which:

Figure 1 is a side elevation of a standard plier to which the present wire stripping plates are adapted to be connected.

Specification of Letters latent.

Renewed June 21, 1919. Serial No. 305,918.

Fig. 2 is an end view of the device shown in Fig. 1.

Fig. 3 is a detail perspective View of one form of blade adapted for attachment to a pair of pliers.

. Fig. 1 is a perspective view of a modified form of the plate also adapted for attachment to a pair of pliers.

Fig. 5 is a plan view of the implement shown in Fig. 1 when it is used as a means for crushing the insulation upon a multiplestrand conductor.

It is one of the important features of the present invention to provide an improved wire strlpping tool which will enable the ready removal of the insulation upon electric conductors of various forms and sizes, and the invention may be incorporated either integrally in the structure of the aw or lever members of any suitable form of pliers or pincers, or may be incorporated as is illustrated herewith in the provision, of plates of suitable design adapted to be read- 11y connected to standard forms of pliers now already made and in use, with no other alteration thereto than the simple drilling and tapping of a hole or holes as may be desired to rovide for the subsequent attachment of t e detachable plate or plates to the pliers.

In the drawings there is illustrated a conventional form of pliers having a pair of handles H pivoted together at P and having forwardly projecting opposed pincer or purchase jaws J J which may be provided intermediately of their ends and the pivot P with a pair of cutters C as is well know and common.

- The invention may be embodied, as above suggested, by integrally forming the jaw members of the pliers when so desired with means for stripping the insulation from electric conductors, and in the form of the invention illustrated in Figs. 1, 2 and 3 the embodiment assumes the form of a pair of right and left hand plates 2 of suitable material and proportion so as to give the desired rigidity and stiffness and strength to serve the purpose in hand, in this instance the plate 2 having a shank provided with a pair of apertures 3 through which there may be passed fastening screws 4 to be threaded into appropriate apertures made in the respective jaws JJ of the pliers at suitable positions. In Figs. 1 and 2 the plates 2 are shown as connected to the common sides of the opposed jaws JJ and preferably adjacent the ends thereof, and each of the plates is provided with a transversely bent blade portion 5, which, when the plate :2 is attached to its respective jaw, stands in a plane substantially perpendicular to the side of the jaw and the blade portion 5 is also so disposed by the arrangement of the plate 2 on the jaw as to stand in a plane oblique to the meeting plane of the closed jaws. Thus when a pair of the plates 22 are secured, as shown in Fig. 1, to one side of the pliers, these blades 55 are disposed in opposition to each other with their meeting edges 6 in close juxtaposition and the planes of the blades 5 5' diverging outwardly and obliquely from their meeting point.

The operative edge 6 of each blade 5 of the stripping means may be provided with a series of concavities or notch cs 7 of various sizes, and when these cavities are brought into juxtaposition by closing oi the jaws against each other they are adapted to snugly embrace a wire which is to be stripped, and then by pulling the pliers when in closed position along a strand of wire the insulation thereof will be removed. The objector the inclination or oblique disposition of each of the blades 55 to each other'and as'to the operative faces of the jaws is to secure a raking efi ect upon the insulation to be removed which will thus increase the rapidity of action and reduce the resistance of the cutting of the insulation and thereby facilitate the cutting and stripping of the insulation from the wire.

' 'While the invention in one of its simplest forms is shown as illustrated in Figs. 1, 2

and '3' it may also be embodied in a slight variation as shown in Fig. 4t in which form the plate 2'is provided, in addition'to its cutting blade 5 with its sharpened 'and notched edge 6, with a transversely bent tongue 5' turned in the opposite direction from the direction of the blade 5, and which is provided with an aperture for the reception of the fastening screw 4, in this instance the extension 5 of the plate 2 being adapted to overlap the upper surface of the plier jaw to which it maybe applied, as shown in Fig. 4:, and be securely fastened thereon. If desired the upper surface of the jaw to which this type of the scraping plate is to be attached may be transversely slotted as at 10 to receive the extension 5, although this is not necessary.

In the use of the device the wire to be stripped may be inserted between the large cutting'jaws CC and these brought together so as to cut through the insulation about the wire without cutting into the wire or the wire may be inserted between the cutting edges 66 of the strippingblades 5 and these may be brought together so'as to cut a circle about the wire at the point at which it is desired to begin the removal or stripping of the insulation. In either case the wire is then laid along the side of the pliers parallel thereto and the blades 5-5 brought together at a suitable point on the length of the wire and drawn along the same so that the rake-like blades 5 5 willact to strip and remove the insulation from the wire. In some instances, for instance when stripping certain electric conductors in which the're is embeddedor incased a plurality of conducting wires, the conductor may be encircled by a cut at a suitable point and then laid transversely across the pincer faces of the jaws J J and these brought together by pressure upon the handles H so as to crush while the cutters 5-5 split the insulation somewhat and thus facilitate its removal by the scraper blades 55 when the conductor islaid between them so as to bring the wire to be scraped into alinement with one of the scraping notches 7 provided in the edges of the blades 5. F or the purpose of adjusting the approach of the jaws J-al award each other through the manipulation of the handles H any suitable device may be utilized which'is here shown as comprising a s'etscrew. S mounted in one of the jaws in the rear of the pivot P. U

A very important advantage in arranging the cutters 55 near the ends of the jaws JJ and remote from the fulcrum P is that various sizes of insulated wire may be readily pushed transversely across the jaws in alinement with the cutters 5-5 to facilitate splitting, as shown clearly in Fig. 5. Also that by this arrange'ment no interference 'is caused with the ready use of the ordinary lateral cutters C -C1 Itwill thus be seen that Thav'e provided for the ready conversion of an ordinary type of pliers or' pincers into a stripping tool by the simple attachment thereto of'the present stripping devices, thesebeing' adapted for attachment to the jaws of the pliers or pincers'by screws or other simple means which'may be threaded into apertures made for their reception in convenient portions of the' j'aws of the pliers. i

l/Vhat' is claimed as new is:

1. In tool ofthe class described, crossed pivoted levers having opposed pincer jaws at adjacent ends, and a pair of coacting splitting and stripping blades each secured to the side of one of the levers and ldcated between the ends of the jaws, the blades extending substantially perpendicularly fromthe sides of the levers and having "their operative edgesin the planes of the respec tive pincerfaces of the jaws.

2. In a tool of the class described, pliers having a pair ofpincer aws between which insulation on wire may be crushed, means to adjust the approach of the jaws, and a pair of opposed splitting blades projecting normally from one side of and having their edges in the pincer planes of the jaws and disposed midway of the length thereof, whereby the insulation on inserted wire may be split and crushed at one operation.

3. In a tool for longitudinally splitting insulation on wire and then crushing it, a pair of pliers having pincer jaws, and a pair of coordinate splitting blades arranged on one side of, and normal to said jaws, and having their edges adjacent to and in the planes of the pincer'faces and midway of the length of the jaws, the said blades lying in planes nearly perpendicular to the pincer faces; whereby as insulated wire is advanced along said blades and across the pincer faces the insulation is split and crushed by operation of the pliers.

In testimony whereof I afiix my si ature.

SOLOMON E. AA ON. 

